Occurrence of Persistent Organochlorine Pollutants in Sediments from Lake Piediluco, Italy
نویسندگان
چکیده
In surficial sediments of Lake Piediluco, a small, riverine, regulated and heavily modified water body in the Central Italian Apennines, contamination by persistent organochlorine pollutants (POPs) was assessed. During spring autumn, six representative points were investigated. Reflecting substantial zonation pollution within this aquatic ecosystem, concentrations found to vary from site site. OCPs, particularly DDT its metabolites DDE DDD, detected at varying frequencies 0.301 8.185 ng/g d.w., whilst total PCBs (Σ50 congeners) 0.570 10.206 d.w. Although both PCB congener-specific homolog patterns suggest prevalent presence Aroclors 1254 1260, more limited likely contribution 1248 technical mixture is not be excluded. western area lake, affected daily continuous basin remixing for hydroelectricity production, major seasonal differences OCP found. Conversely, eastern typified low fluctuation small variation among sites. Regardless either collection or seasonality, polychlorinated-p-dioxin furan (PCDD/Fs) below 8.3 pg WHO-TEQ/g. contrast present study, POP PCBs, PCDD/Fs some DDT-derived has been investigated so far. Nevertheless, are typical low-polluted pristine lakes consistently lower than those other greater size depth (e.g., Como, Garda Maggiore). The physical chemical properties analytes consistent with probable diffuse point source originating catchment area, rather atmospheric depositions regional long-range transports. Finally, according international sediment quality guidelines (SQGs), Piediluco pose risk sediment-dwelling organisms and, generally, wildlife such ecosystems.
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ژورنال
عنوان ژورنال: Environments
سال: 2023
ISSN: ['2076-3298']
DOI: https://doi.org/10.3390/environments10070120